package com.example.crm.mapper;

import com.example.crm.pojo.Customer;

import java.util.List;

public interface CustomerMapper
{
    // 查询所有
    public List<Customer> findAll();

    public int insert(Customer c);

    public int deleteById(int id);

    // 查询1个
    public Customer findById(int id);

    public int update(Customer c);




}
